skysight-inc/HackerNews huggingface dataset:
After looking at various papers on the topic I found some equations of motion, did some algebra and wrote some python code. Here is the result

video of simulation results animated:
http://www.youtube.com/watch?v=U1QqYBOrYjA

python code:
git://github.com/paulgribble/metronomes.git
If you've never lost your house keys twice ($75 per visit for a locksmith) then it's not worth it. However, you could give multiple people access to the door this way, which would be cheaper/easier than making copies of keys.

Also, with normal keys if you lose one you have to replace the cylinder and all the keys if you're worried about someone using the lost key. This would prevent that expense.

I will say, though: if $150 is the discount price, i'm afraid to learn what the regular price is. Businesses seem like the only place this becomes cost effective.
http://www.pnas.org/content/early/2010/10/08/1006993107.abst...

But in widespread use probably quite a bit less.
Seems like they were going to split directions at one point or another. Sad to see this happen as I love Quora but unfortunately, investors are in the business of making money, not building amazing user-friendly webapps.

Is Quora a great service? Absolutely. Is Quora something I would be incredibly sad to see die? Without a doubt. Is Quora ever going to make enough money to cover costs? Probably not.

This leaves a sale as the only possible exit. Adam is taking the unsexy role of being the business guy that drives Quora towards this conclusion. Great product and engineering minds will quit (especially with the departure of Charlie). People will cry out about how "the Quora I loved is dead" and new features will prompt blog posts like this one: http://www.bothsidesofthetable.com/2012/09/10/the-misstep-of... . But Adam has no choice, either he does this or the company dies and everything that is good about it is lost.
Past history is never a solid guide. An LP at one of the valley's venture firms once told me that the value of the track record for him was that it meant that if the stars did align on the idea and the market, then the team which had been successful in the past would likely be successful with this idea. On the other hand, if the team had not been successful in the past then there was the chance that the idea and market would be there and they would drop the ball.

Its a challenge when folks conflate their previous successful venture with an ability to deliver an idea when they won't or can't acknowledge the role of serendipity in the timing.
Oh, okay. That's actually really interesting, I had no idea. Haha Thanks! :)
Edit: Maybe remote teams can print out all your coworkers so they keep you company.

That was almost my first thought on seeing this :-)
My handle doesn't have a lock. I only have a deadbolt.

I also have an RFID fob to get in my building and I need to type a code in to my elevator to get to my floor, so I'm not too worried about it.
XtGem – inside an accelerator program
Why is mobile harder?
For me, it'd be about guest access. Sure, you could give out your codes, and then change them later, but that's a pain (with the Schlage products at least).
To be fair (I share some of your hesitance), the old-fashioned key still works, so if for some reason one of these dependencies was unmet, then you're not totally out of luck.
> A terminal still can't render images.

How often do you see images in your emails?

They are usually remote linked content, so your client disables them for privacy reasons. How often do you really click "display images in this message" versus "meh, I got the message and I can spare the rounded corners on this advertisement and instead not send a req back to their server notifying them I've read it".

But I get what you're saying. Without HTML emails we'd all still be looking at those ">" characters for quoting. Hideous. At least now we got dark blue vertical bars. I for one couldn't live without them. That's progress!!
Or you could just buy a Philips EnduraLED bulb and put it in your existing $25 lamp.
Do I need to apologize for pointing out PHP's obvious flaws and that anyone who doesn't need to use PHP for hosting reasons or for library/framework reasons probably isn't using it?

I use PHP to develop for the web every day. Thus far, the friction of PHP being a bad language hasn't outweighed the utility of it being easy, though as time goes on that utility is worth less and less.
Your threat model seems a bit out of whack. Picking your conventional lock has a much better cost/benefit ratio for a thief.
Why We Are So Rude on Facebook and Other Social Media
I always been a huge fan of simplicity in web design. I think for such a huge company, they nailed it.

I know a lot of designers have taken shots at this design, but its not for them - its for the users:

"For the Microsoft.com team to take a calculated risk and pour their understanding of their users into a cleaner, smarter, and modern page, the change had to start with the the source of the, and in my opinion every, problem: People."
Is Microsoft.com working on everything or is it like MSN.com that will only work in Windows 8 and IE10?
If you live in the US it might be a good idea to have a telephone plugged into your landline anyways. This way if there's a combined electrical failure and cell phone failure, you'll still be able to make 911 calls. There is also a reverse 911 conference call system that works with landline phones.

At least in California, if you're renting, your landlord is required to provide you with a working telephone line. You and them don't even need to pay anything, just make sure there's a working dial tone.

Related: http://www.opb.org/news/article/few-receiving-reverse-911-ca...
Sorry I wasn't clear, but my first two points were about what you said about reducing a person to their body parts as not being sexism or objectification.

Beyond that, what exactly are you supposed to think when Noah Kagan, someone who has already made hugely sexist statements in the past, wants to tell you about "the 3Ps of entrepreneurship"? That kind of statement is a lead in, and that he tried to backtrack when the audience reacted is irrelevant. Reducing anyone to their body parts at all is a big problem and is a horrifying thing to say, but women and trans folk suffer much more from this kind if rhetoric then cisgender men do, so don't pretend that this kind of statement is OK or is no big deal.

> Also, how do you know his statements weren't actually directed at lesbians, who are attracted to similar private parts, why assume he was targeting straight men?

The orientation of the folks in the audience is not the issue, it is the reduction of people to sex objects for conquest that is the problem.

> in this case, again with so little context, I would lean towards !lighten up everybody!

Saying that people need to lighten up is a dismissal that says you don't really think that this is a big deal and you don't care about the issues this brings up for many people. This kind of attitude perpetuates these kinds of incidents and makes it harder for people whose lives are directly affected by this kind of shit.
Yeah, that's not too bad but I would still be a bit worried since my place has a door that is accessible from outside. You are lucky with that sort of "double secure" entrance! Haha
It's pretty obvious that more and more things are converging to the phone. We've already seen how modern smartphones have markets like the point-and-shoot camera and portable music player. It makes sense to carry around one device that does as much as possible. And I love the extension of the smartphone into these home automation areas (though I realize locks have a significantly greater market than just that). What troubles me right now is the fracturing, but that's inevitable in emerging markets. It would just be nice to have a really great product line that I could use to unlock deadbolts, open my garage door, automate my lights, control switches / outlets, program my thermostat, etc.
It looks like a great product and I was expecting to see between 150~350$ each but at 500$ on kickstarter and 800$ once released I don't get it.
Thanks! We did consider to show an automated summary of any webpage that was not already summarized by a human, but our tests showed that our users prefer to summarize from scratch than from a computer-generated summary that's usually of very low quality.
PEJ Economist Challenge | Visual.ly
DynDNS gets $38M investment
I did a Lean Startup Machine workshop the other weekend where we learned to utilize this board. It was an awesome workshop and I learned a lot.

This board helps you iterate over your idea. It's like agile development, but focusing on the idea.
Though in general, you are right that academics tend to be over-obsessed with worst-case performance; see e.g. heap-sort.
Novel and entertaining. Reminds me of creating a Mii on the Wii, only they arrive at your door.

It would be cool if you could get super mini versions that you could hand out as business cards. It's the kind of thing that recipients would definitely show around, and hold on to.
"Empirically people are a lot less likely to forget their phone than to forget keys,"

That also varies on whether you drive a car or take public transportation.

If you drive, leaving your house requires taking your keys and it becomes a habit. Same with leaving work. If you drove there you need your keys to leave.

A good way around forgetting keys also is a realtor style lockbox either on the door or hidden with a spare key.
FWIW, I find it simple enough to add/remove codes as needed. I can see how punching ~15 buttons can be a pain, but I don't find it so.
> The answer makes one good point, though: D'Angelo did invest his own money in Quora, basically buying sole control over the company.

The first clause (investing money) is a much less profound statement than the second clause (buying sole control).

In order to buy sole control, he set the valuation of the new shares at something that washed out the "A" round guys. That should be a giant red-flashing signal to everyone involved.
The science of customer service: emoticons make 84% more users happy
I'm interested how you are using the product since it does not seem to be available to the public yet.
It's obviously a luxury designer lamp. I do wish such kickstarters would make it obvious from the start if it's art home appliance they're selling or an everyday home appliance. Possibly also offering something lower-cost and not so luxuriously designed - I can't believe 4 LEDs and a heatsink cost $800.
PHP article yet the 'nice' image at the top seems to be OSX booting in verbose mode.
Not necessarily, but I see your point. The threat model you suggest seems to be for a "one and done" event (which is a perfectly valid scenario). But the initial threat model was geared towards repeated, quick, and relatively inconspicuous access to a secure facility.
Katana 3.0 Beta - Portable multi-boot security suite
For what it's worth: this article is syndicated from Business Insider. It wasn't written by San Francisco Chronicle staff.

Here's the original: http://www.businessinsider.com/the-sudden-mysterious-exit-of...
Oh, and can you make a zombie setup? I would totally pay for a mini-zombie-me
You should apologize for insinuating a person's choice of a programming language is a reflection of their intelligence.

I'm sure you're perfectly capable of writing marvelous code in PHP or any other language.
If you use pg_dump to dump/restore the table, it will reset the sequence to the correct value. Look at the dump file, there will be a setval of the sequence.
Hi, thanks a lot for the feedback! we're glad that we're solving a problem for you! You're right that we have little content for now, but we don't think NLP is the answer.

Humans are so much better than algorithms at summarizing content and we really want to focus on quality rather than quantity for now. We want to become a platform for the content that people deem worthy of being summarized and are hopeful that the overall quality will therefore be astounding. As such we are focusing on building a community of excited contributors.

I'll definitely checkout condensr.com to see if it can help at all though!
Twitter Says More Than Half Its Users Follow Six Or More Brands
From the posting, "On Thursday, November 22nd, all applications that have not requested an extension will no longer be functional. Owners of paid Aspen apps have been individually contacted about this change. We provided migration instructions, a contact for requesting an extension, and many of them have already migrated their apps."

For those of you who were paying for services on Aspen, when did you receive your notification?
Ace. Halloween is around the corner!
Two thoughts:

1) Interesting that they're not bothering to notify unpaid users of the aspen stack. Side benefit of this, I guess, is that they can shed some of the unused, unpaid apps they've accumulated.

2) In light of 1, It'd be nice if there was an easy way to find out if I have any aspen apps. I had to go to the settings page for each of my apps to find out I'm using Bamboo and Cedar across the board.
Visual.ly - San Francisco - non-technical position

Visual.ly is looking for an amazing project manager to join our team. You would be primarily responsible for ensuring the success of projects that take place on our infographic platform.

Apply via email: http://visual.ly/about/jobs/
So when turning my attention to onboarding, I replayed each of my current customers timelines looking for trends.

I won’t get into the SQL behind what I did...

Brennan, could you go into more detail here on how you did this? I understand not doing that on your product blog, but I suspect folks here might be interested in the details.
Zenbox Omniwrite: Powerful customer admin panel works with your existing SaaS
MongoDB at Parse with Amazon’s EBS and Provisioned IOPS
The accessibility is a huge selling point, but also (and often overlooked) is the non-prescriptivist nature of PHP. For so many jobs (and yes, even in enterprise) you just need to get the project done and out there. It doesn't have to conform to perfect OO standards and doesn't have to follow certain architectural specifications. PHP is great for that.

When you need to take it to the next level and establish a really good and efficient standard, there are extremely well-done frameworks to assist you. But when you just need to get something done, sometimes PHP's "do it anyway you can" nature is it's biggest feature.

It will be interesting to see what mobile play Gutmans et. al. have. If they can bring that same "let's just get it done" mentality it may have a chance. Interested to see how it goes down.
Renters. Lockitron isn't viewable from the outside.
Ah, that makes sense to me.

I hadn't thought about the multiple people access problem since I've never needed more than one set of guest keys at a time, and the offices I've worked in were all big enough to use keycards.

Come to think of it, the market for 'Needs to give multiple people rotating revocable access' is a great fit for AirBnB type services.
Interesting... I'm actually in Europe, and the phone line is on the back of the cable modem, so if there is a combined power failure we are out of luck...
I'm not talking about old CPU's going down in price. I'm talking about the "new" CPU's, which is what Intel will be pushing. Not like anyone still wants a cheap $20 Intel Pentium M in their laptops anymore. My point is they are overshooting in performance, and that means they are overshooting in price, too. And most consumers simply won't care. People pay $1000 or more for Macbooks because they are from Apple. They are buying the brand. It doesn't really have anything to do with pricing there. I mean, it's not like you can just say "Hey, if Apple can sell 20 million $1000+ Macbooks per year, then so can HP, or Dell!". Far from it.
Thanks, that's kind of you to say
Html5 big size video and audio chillout ambience
Your two sentences sort of contradict each other.
Dear HN: Stop complaining about the "Unknown or expired link" issue
Search for it. It's been an issue for 5 years. Your request to fix it will not be answered. Just stop asking.
I believe this is ACTUALLY a preorder, rather than an investment that includes a "prize" if they actually succeed.
But the lockbox has been working just fine for hundreds of years and isn't technological enough!
Typescript support has landed in Cloud9 IDE
It's a ycombinator backed company:

http://techcrunch.com/2011/05/13/lockitron-lets-you-unlock-y...
Nice, but it looks more like a place for pleasure than for work.
In other news, the world's largest manufacturer of hammers has announced a new model accepting hex-bit screwdriver tips in the end of its handle.
Counterpoint. A few weeks ago one of my coworkers showed up in the kind of shoes that some people use on the beach (http://www.billig-sport.dk/public/produkt/stor/2699.jpg) with one of them only held together with duct tape.

During the summer several people showed up with no shoes at all.
Any Trie varient will have that as well though.
Well, I was interested as to why Lockitron had a pre-order page up as I own one as well.

It's differently (visually) than the version that is on the website now but, it's certainly a Lockitron lock which I purchased almost a year ago.

Looks like they are rebooting their company with a new model and fundraising via Kickstarter.
I'm sorry that my response was muddled, I did indeed think you were dexen, so apologies for making direct accusations against you (I added a note in the above comment about this).
Justice Department to defend warrantless cell phone tracking
but what about Engineers?
Wasn't it fixed for a while up until a month or so ago though? Started using "page" in the query string to give us second and third pages?
I agree - hence the "semi" part. I wouldn't do it on my own, but if somebody local were to want to partner and do it, I'd very seriously consider it. Though right now I'm too busy with a startup, but post-startup, it sounds like quite an appealing option.
Persuasive product videos
Kitchen sink libraries like jquery + jquery ui save you from having to write much JavaScript at all beyond basic glue code. The less JavaScript I write, the happier I am. This is in stark contrast to other languages I work in where I actually like to roll my own frameworks.
KDE 4.9.2 Released: Brings October’s Bugfixes And Features
The user codes for these products are 4 digits, and 4 digit codes do not offer much security.

I had a 4 digit Master lock in 7th grade, and an 8th grader spent a little bit of time with the lock, determined the passcode (chosen at random), and then changed the combination.

I wouldn't put one of these locks on my home, or on anything that I wanted to actually "lock"
My main concern with Apple is not that it will lose the ability to release revolutionary products, but that it may lose the confidence to eliminate all superfluous features and make them "just work". There were tablets before the iPad, and smart(ish) phones before the iPhone, but the Apple products were the first that were not only useful, but a pleasure to use. Jobs was well known for his stubbornness and knack for saying "no". I'm concerned that without his almost dictator-like control over product direction, Apple may begin to release compromised products that don't deliver on their values of creating a simplified and effortless user experience.
This is their second product. The original Lockitron came out in 2011 or so. I know many people who installed them in their offices.
Show HN:Diving into Physics-based animation with HTML5 Canvas
The Most Important Meeting You've Never Heard of
Cool! This was first observed by Huygens on two pendulum clocks.
If the price is about the same, why does anyone go for glass & steel? This is so much better.
This is the second version of the Lockitron.
Or bluetooth or NFC, which to me are far more enticing.
Whenever I see tools like this I look up at my whiteboard and go "this does it better" :-)

Never underestimate the power of a big chunk of wall you can write on and stick things to.
Assuming your whiteboard session is a good test of basic CS proficiency, the real question is "does basic CS proficiency correlate with effectiveness at the job?" - if you're like Google the answer is probably yes, and if so you only have to have tolerance for false negatives. Given enough applicants that's clearly less of a problem than false positives.

My other point is that some companies might find there are other qualities they're looking for that occur in the pool of people they pass on. That's what's really worth looking at, I think - all the while being careful not to mistake "good cultural fit" for "promotes long term monoculture".
Hey guys,
Isn't this the same as a debugger. Can people not learn from that?
I hope this goes to the Supreme Court. I doubt it will be declared constitutional. Most people aren't even aware the Government is doing this, or at best they think it's just a silly conspiracy theory they've heard from their friends, but don't really believe it. When that's the situation, it should definitely be declared unconstitutional.
I, for one, completely support this $10 tax on scroll-fixed javascript headers!

Make it $100, it's the BLINK tag of 2012.
I wasn't trying to summarize Liouville's Theorem, I was expressing a different idea. I didn't make that clear.
I went back and re-read it, they do consider the Macbook Air to be an exemplar of what an Ultrabook should be. See this quote:

"We laughed again and pointed out that it wasn’t a Macbook Air, but it did cost more, did less, and still wasn’t a Macbook."

This is the story as I understand it: Intel wants other people to make a Macbook Air functional clone but also want their "traditional" huge chunk of the COGS. In the classic sense they have priced themselves out of the market.
To clarify, I don't mean when asked. Here is an example tweet from Lydia (directory of fun) after returning from a trip:

http://twitter.com/LydiaWinters/status/248842453178781696
Maybe? It's still one of the more popular topics on HN though so it couldn't have been fixed very well.
Most PHP programmers aren't choosing PHP from a toolbox of 5-10 languages that they know really well. They're choosing PHP from a toolbox of one language that they kind of know.
With the rather large exception of filesize.
probably not. it uses an arduino mega according to the video, so you'd need serial access to reprogram the arduino.
Startups shouldn't see marketing as a necessary evil
Is it time to say goodbye to the pageview?
Regarding your first point, the video for Lockitron mentioned that you'd be able to remotely open your door from anywhere.

I'm really excited about this -- I've always wanted to do this for my door, but as a renter I can't exactly just change the locks without my landlord being pretty disapproving.
I think your assumption is right on. Just try to listen to music when you walk and not end up lock-step with the beat.
I've recently started trying to understand how these dilution events occur. I was wondering if you could better explain what happened in this case so I could further my understanding.
Which two, and in what way? I had to re-write my initial comment a few times because I realized I wasn't getting my point across properly.
Every day a new user will join and not have read 5 years of back history on HN.
I love the idea, but, now, when I loose my phone I will be cashless, unable to call someone for help, and locked out of my home.

I also hope they salt their password hashes.
Firefox Tip – Do Not Track on Android